Don't index into SystemInfo gpus if it's empty.

angle::GetSystemInfo may return success on some platforms without writing any entires into the gpus vector. Make sure we don't index into this vector when it's empty. Bug:chromium:1166338 Change-Id: I4cafeadf7aa9ac55b25a1afa04c8d28a2edf52e0 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2628140Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Geoff Lang <geofflang@chromium.org>

Don't index into SystemInfo gpus if it's empty.
50c82f42 · Geoff Lang · Commit Bot · 861378be · 50c82f42
Commit 50c82f42 authored Jan 14, 2021 by Geoff Lang Committed by Commit Bot Jan 14, 2021
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renderergl_utils.cpp src/libANGLE/renderer/gl/renderergl_utils.cpp +1 -1

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--- a/src/libANGLE/renderer/gl/renderergl_utils.cpp
+++ b/src/libANGLE/renderer/gl/renderergl_utils.cpp
@@ -1620,7 +1620,7 @@ void InitializeFeatures(const FunctionsGL *functions, angle::FeaturesGL *feature
    angle::SystemInfo systemInfo;
    bool isGetSystemInfoSuccess = angle::GetSystemInfo(&systemInfo);
-    if (isGetSystemInfoSuccess)
+    if (isGetSystemInfoSuccess && !systemInfo.gpus.empty())
    {
        vendor = systemInfo.gpus[systemInfo.activeGPUIndex].vendorId;
        device = systemInfo.gpus[systemInfo.activeGPUIndex].deviceId;